National 710484 Automatic Transmission Torque Converter Seal - Front

Automatic Transmission Torque Converter Seal

National 710484 is an automatic transmission torque converter seal built for front-position applications across a wide range of Ford, Audi, Porsche, Volkswagen, Saab, Dodge, Mercury, and Lincoln vehicles. It uses a fluoro-elastomer sealing material and a clockwise-spiral lip design to help maintain a tight seal at the torque converter interface.

Key Features

• Part number: 710484
• Fluoro-elastomer material for transmission sealing applications
• Clockwise-spiral lip design
• Metric dimensions: 45.000 mm shaft inside diameter, 58.290 mm outside diameter, 7.000 mm width
• Housing bore: 58.000 mm
• Oil seal design for automatic transmission use
• National sealing solution backed by more than 75 years of industry experience

Detailed Description

This National torque converter seal is engineered to match the dimensional requirements of the transmission case and shaft interface, with a 1.772 in. inside diameter, 2.295 in. outside diameter, and 0.276 in. thickness. The fluoro-elastomer sealing material is selected for demanding transmission environments, while the spiral lip profile supports consistent sealing performance in rotating applications. National 710484 is a direct-fit style oil seal for front-position automatic transmission service on vehicles such as the Ford F-150, Ford Expedition, Ford Mustang, Audi A4 Quattro, and Porsche 911 when equipped with the listed transmissions.

This part cross-references Remy 17646 for the same application.

What It Helps Address

• Transmission fluid leakage at the torque converter seal area
• Fluid seepage caused by worn or hardened seal material
• Seal wear from rotating shaft contact
• Service issues during automatic transmission repair or rebuild
• Front seal replacement needs on Ford 6R80, 6R60, and ZF transmission applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and transmission code before installation. Clean the seal bore and mating surfaces thoroughly, and inspect the torque converter hub and shaft for scoring or wear that could affect sealing. Use proper seal installation tools to avoid damaging the lip or distorting the seal during assembly. Confirm the application against the vehicle’s transmission type, especially on Ford F-150, Ford Expedition, and Mustang models with 6R80 or 6R60 units.

Quality Assurance

National has supplied premium sealing solutions for more than 75 years and continues to develop sealing components for modern vehicle platforms. Part number 710484 is built to National’s established sealing standards for transmission service.